I hope I've run over a witch!

[JasonH]

It's the wadding from the silencer.

I'd recommend lining up a new exhaust. If the wadding is coming out there is probably more to come and it could block or partially block the exhaust. If the exhaust blocks it can go bang. If it partially blocks you'll get reduced power and may not notice.

[STMO123]

I had a witch living in the back box of a Cav Sri - until I overtook a Rover V8.  I dropped it into 2nd at 50mph and floored it - boom - big cloud of smoke and a dead Yorkshire Terrier rolling in the road behind.  I went back to investigate - no dog - just the baffle wadding, the sudden burst of speed forced it out in one go.  So, drive nicely and it may run for a while longer, at worst it will just get noisy and then fall off  

[rpont]

Isn't there always the chance that the baffles will break up and block the exhaust causing it to stop? If I needed to do 700 miles a week I think I'd be having as new back box fitted.

Fishcakes!!! missed page 2.

What I mean is I agree with Jason.